After making this for a demo in a skillet because I have no oven available, I will never make lasagna in the traditional manner. An easy weeknight recipe for dinner and leftovers it’s ready in about 30 minutes with little prep. Feel free to doctor it up with herbs, spices, sausage, chopped peppers or whatever floats your boat. Be mindful of the addition of extra ingredients, you may need to adjust the amount of sauce that you use. I wouldn’t add more than a half cup of other chopped vegetables without adding another half cup of sauce. The size of the pan also matters, if you use a larger than 9″ or 10″ pan you may need more ricotta to cover the top of the lasagna but you shouldn’t need to adjust other ingredients. As I say in cooking class, try the recipe as written before you make any changes, then adapt it to your taste. Have fun in the kitchen!